// BandsInTown Java API Client - BandsInTown service interface
// Copyright 2009 PriceFeeder Inc.  All rights reserved.
// http://code.google.com/p/bandsintown-java/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of PriceFeeder Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package com.pricefeeder.bandsintown.util;

import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

/**
 * XStream XML data converter for Date types
 * @author Eli Colner
 *
 */
public class DateConverter implements Converter {

	/**
	 * Unmarshals XML data to Java object.
	 * @param reader XStream XML input stream
	 * @param context XStream unmarshalling context
	 */
	@Override
	public Object unmarshal(HierarchicalStreamReader reader,
			UnmarshallingContext context) {

		XMLGregorianCalendar cal= null;
		
		try {
			String val = reader.getValue();
			if (!"".equals(val))
				cal = DatatypeFactory.newInstance().newXMLGregorianCalendar(val);
	        
		} catch (Exception e) {
			e.printStackTrace();
			
		}
        return cal;
	}
	
	/**
	 * Marshals Java object to XML.
	 * @param value Java object
	 * @param writer XML output stream
	 * @param context XStream marshalling context
	 */
	@Override
	public void marshal(Object value, HierarchicalStreamWriter writer,
			MarshallingContext context) {

		// never used
        
	}

	/**
	 * Checks if the class can be converted to Date.
	 * @param clazz the Class object trying to convert
	 */
	@SuppressWarnings("unchecked")
	@Override
	public boolean canConvert(Class clazz) {
		return clazz.equals(XMLGregorianCalendar.class);
	}

}
